Method of making a generator stator retention system

Abstract

An oil-cooled generator (10) is provided having a housing (20) with a gas-filled interior and rotor (46,56) therein. A stator (44,58) associated with the rotor (46,56) is secured to a surrounding sleeve (70',70) by an interference fit and pins (72',72). A bolt (84',84) is secured in an opening (82',82) in the housing (20) to fix the sleeve (70',70) thereto, the housing opening (82',82) being open only to the housing interior. The housing (20) is provided with grooves (76) therein and a ring (78) is secured to the inner diameter of the housing (20) to secure those grooves (76) to define oil passages (74) therein.

I claim: 
     
       1. A method of mounting a stator in a generator housing, comprising the steps of: mounting a sleeve on said stator with an interference fit therebetween;   inserting pins through said sleeve and into said stator;   forming a bolt hole in said housing, said hole open only to the housing interior;   mounting said stator and sleeve in said housing with an interference fit therebetween; and   extending a bolt through said sleeve and into said bolt hole.   
     
     
       2. The method of claim 1, wherein the sleeve and stator interference fit is provided by machining the sleeve to define an inner diameter less than the stator outer diameter, and said sleeve is heated prior to mounting on the stator. 
     
     
       3. The method of claim 2, wherein the sleeve and housing interference fit is provided by machining the housing to define an inner diameter less than the sleeve outer diameter, and said housing is heated prior to mounting the sleeve therein. 
     
     
       4. The method of claim 1, further comprising the steps of: forming grooves in said housing;   mounting a ring over said housing grooves to define coolant passages, said ring having an interference fit with said housing;   wherein said sleeve and stator are mounted in the ring by an interference fit between the sleeve and ring.